1961 SC 2510. V international biochemical Congress in Moscow. Scott 2508
$0.60 – $3.00
1961. V international biochemical Congress in Moscow.
Catalog numbers: Scott 2508, Standard Collection 2510, Michel 2510, Yvert 2440.
Perforation: Comb 12½ x 12.
Colors: Multi-color.
Printing: Offset lithography.
Print run: 2,300,000.